CLASSIFYING ANGLES FORMED BY PARALLEL LINES

   http://www.shodor.org/interactivate/activities/Angles/

POLYGON SORT

   http://www.crickweb.co.uk/assets/resources/flash.php?&file=quad

PROOFBLOCKS

    www.proofblocks.com

UNDERSTANDING PROOFS

This is a comprehensive packet for teachers to understand proofs

http://mdk12.org/instruction/curriculum/pdfs/clg2activity005.pdf